单项选择题
A.which governs the state of a variable B.which provides a visual and audible alarm C.which indicates values of controlled variables D.which measures the state of the controlled variable
The closed-loop system differs from the open-loop syste...
单项选择题The closed-loop system differs from the open-loop system by（）
A.the lack of a feedback B.the presence of a feed back C.the lack of a computer D.the presence of a computer
From the passage, we can learn that the simplest contro...
单项选择题From the passage, we can learn that the simplest controller action is（）
A.two-step controller action B.proportional, controller action C.integral controller action D.derivative controller action
Which kind of the following controllers is the most sop...
单项选择题Which kind of the following controllers is the most sophisticated controller?（）
A.Proportional controller B.Integral controller C.Derivative controller D.PID controller
